buechermarkt/BuechermarktClient/Backup.cs

using MongoDB.Driver;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.IO.Compression;

namespace BuechermarktClient
{
   public class Backup
   {
      public static void MakeBackup() {
         string folder = Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
         string backupfolder = folder + "\\backups";
         if (!Directory.Exists(backupfolder)){
            Directory.CreateDirectory(backupfolder);
         }
         string tbackupfoldername = "" + (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
         string tbackupfolder = backupfolder + "\\" + tbackupfoldername;
         Directory.CreateDirectory(tbackupfolder);

         var bt = MainWindow.BookTypeCollection.Find(e => true).ToList();
         var json = JsonConvert.SerializeObject(bt);
         StringToFile(tbackupfolder + "\\BookTypes.json", json);

         var b = MainWindow.BookCollection.Find(e => true).ToList();
         json = JsonConvert.SerializeObject(b);
         StringToFile(tbackupfolder + "\\Book.json", json);

         var s = MainWindow.StudentCollection.Find(e => true).ToList();
         json = JsonConvert.SerializeObject(s);
         StringToFile(tbackupfolder + "\\Students.json", json);

         ZipFile.CreateFromDirectory(tbackupfolder, tbackupfolder + ".zip");
         DeleteDirectory(tbackupfolder);
      }

      private static void StringToFile(string filepath, string json)
      {
         //File.Create(filepath);
         File.WriteAllText(filepath, json);
      }

      public static void DeleteDirectory(string target_dir)
      {
         string[] files = Directory.GetFiles(target_dir);
         string[] dirs = Directory.GetDirectories(target_dir);

         foreach (string file in files)
         {
            File.SetAttributes(file, FileAttributes.Normal);
            File.Delete(file);
         }

         foreach (string dir in dirs)
         {
            DeleteDirectory(dir);
         }

         Directory.Delete(target_dir, false);
      }
   }
}